I had this problem with beta version 2, it was corrected with beta version 3. I downloaded and installed beta version 4, and now I have the same problem again. I know if I close the program I'll lose all my data, so I intend to keep it open until a fix is found. Please, find this problem.

To make sure your progress is saved select File > This project > Save a copy of this project. This will create a local copy of the project.

We also kindly ask for your help in locating the cause of the errors:

1. Open Citavi2. On the Tools menu, click Options3. On the General tab, find the Diagnosis section and check the box Send activity log for error diagnosis4. Confirm your choice by clicking OK5. A browser window showing your “Session ID” will open. Do not close the window6. Click OK in the Options menu7. Now repeat the steps that lead to the error8. Once the error occurs, close Citavi9. Enter this thread's URL into the field "What made you notice the error?"10. Send off the form